dreósan
This might be just a supplemental entry adding to an entry in the Main Volume.
Related §§ in Wright's OE Grammar:
In the OE text, the length is:indicated by acute accentsindicated by macronsnot indicated.
dreósan
Add:I. to fall, not remain suspended Hé meledeáwes dǽl gebyrgeþ, sé dreóseð oft æt middre nihte ambrosios libat coelesti nectare rores, stellifero teneri qui cecidere polo, Ph. 261. II. to fall, not remain standing (lit. or fig.), fall down, fall to pieces Þes middangeard ealra dógra gehwám dreóseð and fealleð, Wand. 63. Þá dúna dreósað and hreósað montes ruent, Dóm. L. 100. Druron deófolgyld, Exod. 47. III. to fall, not remain alert, droop, fail, sink Nǽnig manna wát hú mín hyge dreóseð, bysig æfter bócum, Sal. 60. v. tó-dreósan; be-droren.
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A Combined List of Abbreviations.

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A Combined List of Abbreviations.